Not just Atoms-First, Atoms-Focused. An atoms-first text and media program that goes beyond a reorganization of topics, emphasizes the particulate nature of matter throughout the book, art, and problems, and helps students develop their molecular visualization skills as they learn to become expert problem-solvers.The Second Edition's new co-author, Stacey Lowery Bretz, uses visualization tools―based on Chemistry Education Research, and focused on the particulate nature of matter―to help students self-assess what they know before, during, and after each chapter. Smartwork5 allows instructors to use this pedagogy as a diagnostic, and students receive hints and answer-specific feedback within the text. New ChemTour Animations support visualization at a molecular level, and are integrated throughout the media package.